You live your life online -- and anyone can read it. Should employers be able to troll your Facebook or MySpace page? Or should everything that you put online be accessible to anyone, anywhere? With increasingly popular social networking sites aggregating unprecedented volumes of personal data, the age-old issue of online privacy is once again rearing its ugly head. We ask NYU professor and social networking expert Clay Shirky (watch the full interview with Clay Shirky here) where to draw the line between personal and public online.